You work as a network designer for a company that is replacing their Frame Relay WAN with an MPLS VPN
service, where the PE-to-CE routing protocol is BGP. The company has 3000 routes in their distribution
routers, and they would like to advertise their access routers through the MPLS network. Their service
provider, however, only supports 1000 prefixes per VRF. Which two design solutions can be applied toensure
that your access routers will be able to reach all devices in your network? (Choose two.)
A. Use prefix lists on your distribution routers to control which routes are sent to the MPLS network.
B. On your distribution routers, configure null routes and aggregate routes for the prefixes in your network.
C. Configure your distribution routers to send a default route to the MPLS network.
D. Summarize the routes on the MPLS WAN interfaces of your distribution routers.

Voice traffic between two campus enterprise networks is growing. The network designers decide to adda
second 10-Mb Metro Ethernet service parallel to their original 10-Mb service in order to provide more
bandwidth and diversity. The QoS profile will be the same on the new 10-Mb service due to the voice stability
on the first Metro Ethernet link. When the second link is added to the OSPF domain, which traffic design
consideration would have the most impact on the voice traffic when both links are active?
A. per-destination IP address basis
B. per-flow basis
C. per-packet basis
D. per-source IP address basis

You have created a network design that has two point-to-point Metro Ethernet circuits extending a single
production VLAN between two data centers. Under normal circumstances, one circuit will carry trafficand
spanning tree will block the other. If the company wants you to make use of both circuits to carry production
traffic, which two technologies and features will you investigate to integrate into your network design? (Choose
two.)
A. EtherChannel
B. MST
C. Multichassis EtherChannel
D. PVST+

Refer to the exhibit.

Your company designed a network to allow server VLANs in a data center to span all access switches. In the
design, Layer 3 VLAN interfaces and HSRP are configured on the aggregation switches. In which three ways
should the design of the STP domain be optimized for server and application performance? (Choose three.)
A. Use loop guard on access ports.
B. Use PortFast on access ports.
C. Use root guard on access ports.
D. Align Layer 2 and Layer 3 forwarding paths.
7

E. Use BPDU Skew Detection on access ports.
F. Explicitly determine root and backup root bridges.

A service provider has a Resilient Ethernet Protocol ring running as a metro backbone between its locations in
one city. A customer wants to connect one site with one box redundant to the Resilient Ethernet Protocol ring
at two different service provider locations. How can this be done without producing any Layer 2 loops within
the network design?
6

A. Spanning tree at the service provider side only must be enabled.
B. Spanning tree at the customer side only must be enabled.
C. Flex Links at the service provider side only must be enabled.
D. Flex Links at the customer side only must be enabled.
E. EtherChannel at the service provider side and the customer side must be enabled.
F. Spanning tree at the service provider side and the customer side must be enabled.
G. Flex Links at the service provider side and the customer side must be enabled.

Refer to the exhibit.
5

If IEEE 802.1w is in use for this network design, what are two locations where spanning-tree root can be
placed to ensure the least-disruptive Layer 2 failover for clients within VLANs 3 and 4? (Choose two.)
A. Switch A
B. Switch B
C. Switch C
D. Switch D

A switched network is being designed to support a manufacturing factory. Due to cost constraints, fiber-based
connectivity is not an option. Which design allows for a stable network when there is a risk of interference
from the manufacturing hardware in use on the factory floor?
A. Design the network to include UDLD to detect unidirectional links and take them out of service.
B. Design the network to include EtherChannel bundles to prevent a single-link failure from taking downa
switch interconnection point.
C. Design the network to include loop guard to prevent a loop in the switched network when a link has too
much interference.
D. Design the network to include BackboneFast on all devices to accelerate failure convergence times.

A network designer is redesigning an enterprise campus network to ensure that Ethernet switches proactively
attempt to reconnect after a fiber cut. In the design, they will have to address areas where fiber cuts exist on
campus from past troubleshooting, where a single fiber is disconnected in the fiber pair, leading tolooping.
Which feature could be implemented in the design to allow the Spanning Tree Protocol on the switchesto be
protected?
4

A. loop guard
B. UniDirectional Link Detection
C. UniDirectional Link Detection aggressive mode
D. root guard

Refer to the exhibit.
3

You are designing a spanning-tree network for a small campus. Which two of these options would result in a
trouble-free spanning-tree network design? (Choose two.)
A. Convert all ports to trunk ports, prune off the VLANs that you do not require, and minimize the number of
blocking ports.
B. Introduce Layer 3 VLANs (SVIs) and prune off the VLANs that you do not require.
C. Convert all the ports to trunk and enable BackboneFast.
D. Convert all the ports to trunk and enable UplinkFast between all the links.

A network designer is working with a company to improve convergence at the Layer 2 control plane and
decides to use LACP. Which of these components does LACP use to create the system ID?
A. LACP system priority and switch MAC address
B. LACP port priority and switch MAC address
C. LACP port priority and port number
D. LACP system priority and port number